# N235CH: 1981 Boeing-Vertol 234LR

- Status: Valid registration
- Airframe: [Boeing-Vertol 234LR](https://openairdocs.org/model/boeing-vertol-234lr) (registry code 1385049, 35 seats)
- Engine: [Honeywell AL5512](https://openairdocs.org/engine/honeywell-al5512) (registry code 33903)
- Data sheets: [TCDS H9EA](https://openairdocs.org/tcds/H9EA) (Columbia Helicopters Inc.), [TCDS E4NE](https://openairdocs.org/tcds/E4NE) (Honeywell Aerospace US LLC) (OpenAirDocs)
- Serial number: MJ002
- Year built: 1981
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Standard, transport
- Airworthiness date: May 23, 2018
- Certificate issued: July 7, 2023
- Expires: July 31, 2030
- Mode S code: A21B4D
- Registered owner: [Columbia Helicopters Inc](https://openairdocs.org/faa-owner/COLUMBIA%20HELICOPTERS%20INC)
- Location: [Aurora, OR](https://openairdocs.org/faa-place/OR/Aurora)
- Owner type: Corporation
- Owner's area on the map: 45.2403° N, 122.7936° W: Placed by OpenAirDocs at the center of ZIP code 97002, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=235CH
- Page: https://openairdocs.org/aircraft/N235CH

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Boeing-Vertol 234LR)

None in force.

### Matched by engine (Honeywell AL5512)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N235CH.

## FAA accident and incident reports

None matched to N235CH.

## Service difficulty reports (8)

As reported by operators and repair stations. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR CHIA202511059838](https://openairdocs.org/sdr/CHIA202511059838), Nov 5, 2025: ENGINE. OVERTEMP. DURING DESCENT TO DROP OFF PASSENGERS AND CARGO, THE NR 2 ENGINE PTT BEGAN TO RISE TO 905C AND THE N1 WAS AT 102% FOR AT LEAST 15 SECONDS. ACFT RETURNED TO BASE
- [SDR CHIA202407187623](https://openairdocs.org/sdr/CHIA202407187623), Jul 18, 2024: CONTROL BOX. ACTIVATION ERROR. THREE MINS AFTER TAKEOFF, THE COPILOT NOTED A SPLIT IN TORQUE SHOWING THE #1 ENGINE HAD ROLLED BACK TO 40% TORQUE. THE ENGINE WAS BEEPED UP AND THE AIRCRAFT WAS
- [SDR CHIA202407167614](https://openairdocs.org/sdr/CHIA202407167614), Jul 16, 2024: CONTROL BOX. ACTIVATION ERROR. SHORTLY AFTER INITIAL TAKE OFF FROM OUA, PILOT NOTED THE #1 ENGINE SOUNDING LIKE IT WAS ROLLING BACK. LOOKING AT THE GAUGES HE FOUND A 35% TORQUE SPLIT BETWEEN 
- [SDR CHIA202102014798](https://openairdocs.org/sdr/CHIA202102014798), Feb 1, 2021: SUPPORT FITTING. CRACKED. DURING RAMP CHECK, FOUND VERT SHAFT #2 SIDE FORWARD ATTACHMENT SUPPORT FITTING CRACKED ALL THE WAY ACROSS THE UPPER HI-LOKS.
- [SDR CHIA2019112624266](https://openairdocs.org/sdr/CHIA2019112624266), Nov 22, 2019: ENGINE. POWER LOSS. WHILE IN CRUISE FLIGHT FROM BAGRAM THE PIC HEARD A CHANGE IN RRPM AND OBSERVED THE #1 ENGINE TQ DECREASE BY APPROXIMATELY 20% THEN RETURN TO NORMAL. HE ALERTED 
- [SDR CHIA201909124159](https://openairdocs.org/sdr/CHIA201909124159), Sep 12, 2019: ANGLE. CRACKED. ISOLATED CRACK FOUND IN ANGLE AT STA 160, BL 11R TO 23R, WL +56 APPROX.
- [SDR CHIA201901073719](https://openairdocs.org/sdr/CHIA201901073719), Jan 7, 2019: WEB. CRACKED. DURING C CHECK INSPECTION, FOUND A CRACK APPROX 2.6 INCHES LONG AT STA 482 WEB CENTERED AT WL 27.25 BL 47R. ADDITIONAL FURTHER EVAUATION DETERMINED REPAIR TO BE
- [SDR CHIA2018081063437](https://openairdocs.org/sdr/CHIA2018081063437), Aug 6, 2018: TRANSMISSION. MAKING METAL. CHIP LIGHT ILLUMINATED ON THE CAUTION PANEL DURING APPROACH TO LAND. CONFIRMED AFT TRANSMISSION ON THE MAINTENANCE PANEL. INSPECTED THE CHIP DETECTOR, FOUND LAR

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Related

- Other Boeing-Vertol 234LR aircraft: https://openairdocs.org/model/boeing-vertol-234lr/aircraft.md
- The Honeywell AL5512 engine: https://openairdocs.org/engine/honeywell-al5512.md

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